Question about keto diet

I am trying loose some calories. I like eat and is hard for me to quit something. How is with keto diet?? It is hard to get used to it?? I like meat and maybe this can be for me. 

Does it really works?? 

How long does it takes to get used to this diet habits??

What can you eat instead of potatoes and pastas??

I hope someone write me answers. Someone who tried and know something about it. Thank you